Roll cleaning device



April 1961 R. e MEHLER ET AL 2,977,927

ROLL CLEANING DEVICE Fil ed March 17, 1958 2 Sheets-Sheet 1 INVENTORQ R.G MEHLER ETAL ROLL CLEANING DEVICE April 4, 1961 2,977,927

Filed March 17, 1958 2 SheetsSheet 2 -44 a F ?6 a| 0 /55 All &

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United States Patentfn' ROLL CLEANING Filed Mar. 17,.1958,,:S.er..No.721,850

7 Claims] cl. 113-203) This invention pertains to coating rolls and inparticular to an improved apparatus for cleaning and preventinga'build-up of coating material on the rolls.

In a continuous coating process such as galvanizing, the galvanizingmetal, namely, zinc, tends to build up on the coating rolls. Thisbuild-up, if not removed, will destroy the roll contour by adding to thediameter of the roll up to several thousandths of an inch, since it doesnot generally'occur uniformly across the roll face. Therefore, theopening along the junction of the rolls varies causing variations in theamount of Zinc applied to the metal being galvanized. -The build-up mayalso cause distortion of the strip being galvanized due to the variationin the opening along the junction of the rolls. The existing methods ofremoving this build-up are extremely crude and inadequate. The practicetoday is forjthe operator to judge from a visual observation of' thecoated strip where he thinks the build-up is ex cessive. He thenproceeds to cut away the build-up with a long handled hardened metalscraper. This method of removal requires considerable skill,particularly since the operator is trying to remove the zinc coating ofonly a few thousandths of an inch based on a visual observation. Thedilficulty of this method is further magnifled by the fact that theoperator must stand'several feet away from the rolls while'he is tryingto remove the aforementioned build-up. If the operator should misjudgethe amount of the build-up, he is very likely to gouge the surface ofthe roll which would necessitate the replacement of the roll .at aconsiderable expense. The present methods are only partially effectiveandgas a result a need is presented for means that will accurately anddependably control the thickness of the coating material on the roll.Therefore, it isan object of this invention to provide an automaticmeans for maintaining a thin uniform layer of coating material oncoating rolls. A further object of the invention'is to provide anautomatic roll dressing means that may be adjusted to accommodate rollsof various diameters.

A still further object of the invention is to provide an automatic rolldressing means for maintaining the concentricity of the rolls during thegalvanizing process.

A still further object of the invention is to provide an automaticapparatus, that is especially adapted, for maintaining the properthickness of the galvanizing material on the rolls during the continuousgalvanizing process.

A still further object of the invention is to provide an automatic rolldressing means that may be usedjin conjunction with known machines inthe continuous galvanizing process.

These objects and still others will be apparent upon reading of thespecification with reference to the following drawings.

I111 the drawings:

Figure 1' is a front elevational view of the roll cleaning deviceembodying the invention.

Pa-tented Apr. 4,1961

Figure 2 is an end view in elevation taken along the lines 2-2 in Figurel.

Figure 3 is a 'cross sectioned segmental view of th device as shown inFigure 1;

Figure 4 is a cross-sectional view taken along the lines 44inFigure 1.'

Figure 5 is across-sectional view taken along the lines 5-'-5 in Figure'1. g a Figure 6 is a cross-sectional view taken along the lines 6--'6inFigure '2. V

Although the invention-will be described'as used in conjunction with agalvanizing process, it is to be understood that this is merely anexample and that the invention may be used in conjunction with othertypes of processes. I 6

Referring now to the drawings, there is shown a pair of rolls '10suitable for continuous galvanizing, either or'botho'f which may apply agalvanizing material to a metal platepas'sed therebetween, in aconventional manner. These rolls are mounted on the stub shafts '12,which are journaled in the vertical support members 14 at the ends ofthe rolls 10. The support members '14 are joined together at their upperends by the cross members'16. It is to be understood that the rolls asdescribed herein are merely illustrative of the various galvanizingapparatus, and are in no way to be construed as a limitation to thepractice of the invention.

As shown in'the drawings, a roll cleaning device generally denoted bythe numeral 17 is used with each of the rolls 10. Since the rollcleaning devices used with each of the rolls are identical, the,description hereinafter will be applicable to both. The roll cleaningdevice includes a translating screw 18 which extends between the supportmembers 14 with its ends rotatably journaled therein. A second supportmember 22 is journaled at each end of the roll 10 on the stub shafts 12and extends upwardly therefrom with the translating screw beingjournaled therethrough. Each support member 22 is comprised of twoparts, 24, 26, which co-operate to form a bifurcated yoke, as best shownin Figure 2. Mounted on the inside of each portion of the yoke are thebearing blocks 28 which ride on the stub shaft 12 of the rolls 10. Thetwo levers 24 and 26 are pivotally connected by the pivot member 30 sothat the yoke can be adjusted to accommodate shafts of variousdiameters. The lever 24 at its upper'end is provided with a clampportion 32 which receives the upper end 34 of the lever 26. The end 34extends through the right hand portion of the end 32 in the manner shownin Figure 2. The end 34 is biased by a spring 36 towards the right sothat the shaft engaging portion of the lever 26 is brought into contactwith the stub shaft 12. In this manner a yoke is provided whichautomatically adjusts to different sized stub shafts.

In Figure 3 there is shown a preferred method for mounting the ends ofthe translating screw 18 in the support members 14 and 22. Thetranslating screw 18 is provided with a threaded portion 38 and a smoothportion 40, which are separated by a collar 42. The smooth portion 40extends through the supports 14 and 22 and is journaled therein by thebearing members 44, 46, and 48. Each of the bearing members 44, 46, and48,, is provided with a collar 50 which aidsin the posi tioning of thebearing with respect to the shaft and related support member. A furthersection 52 extends from the end of the translating screw 18 for mountingthe drive pulleys 54. These drive pulleys are driven by a belt 56'fromthe motor 58, shown in Figure 1.

In Figure 1 there isshown one view of the carriage assembly, generallydenoted by the numeral 60, used in the, construction of theroll cleaningdevice. The carriage assembly 60 rides on the pair of track members 62,which are laterally spaced from the translating screw 18 and aresupported at their ends by the support mem bers 22. The track members 62have a six-sided crosssection with a pair of the apexes aligned in asubstantially vertical position, as best shown in Figure 2. p j

The carriage assembly 60 includesa body 64, in which are mounted eightwheels 66, four on each side, as shown in the drawings. The wheels 66are adapted to ride on the track members 62, with two of the wheels onthe top side of each track member and two of the wheels on the bottomside of each track member. The wheels 66 are provided with a taperedgroove 67 which is complementary with the apexes of the track members 62on which they ride. provide the stability necessary in the operation ofthe roll cleaning device described herein, although other constructionsmay be suitable.

The body 64 of the carriage assembly 60 is provided with a bore 68adapted to receive the threaded portion 38 of the translating screw 18.The bore 68 is internally threaded complementary to the threads of thetranslating screw 18 so that as the translating screw 18 is rotated, thecarriage assembly moves along the track members 62 parallel to thecenter line of the associated roll 10. Adjacent the ends of the trackmembers, mounted on the support members 22, a limit switch 59 isprovided which is electrically connected to the motor 58. The limitswitches are adapted, when contacted by the carriage assembly 60, toreverse the direction of rotation of the motor, and consequently reversethe direction of rotation of the translating screw. In this manner it ispossible to continuously reciprocate the carriage 60 back and forthalong the track members 62. Secured to the lower side of the carriageassembly 60 is a downwardly extending arm having a dog-legged curvature,as best shown in Figures 1 and 2. The arm 69 is adapted to clear theperiphery of the roll 10 so that its lower end is spaced therefrom. Atthe lower end of the arm 69 a cutting implement 70 is mounted which isslightly spaced from the surface of the roll 10 when the cleaning deviceis in operation as will be seen later on.

The arm 69 is so attached to the carriage assembly 60 that it may bepositioned relative to the support 22 so that the cleaning device canaccommodate various sized rolls. An example is shown in Figure 2 by thedotted lines in which the arm 69 and the cutting tool 70 have beenpositioned so that the cleaning device accommodates a smaller roll thanis indicated by the solid lines.

The arm 69 is constructed of two parts 72 and 74 which are lockedtogether by the bolt 76 and the complementary dovetail structure 77shown in Figure 6. The part 74 of the arm 69 is provided with theshoulders 78 and the ridge 80 which has the threaded bore 81. As shownin the drawings, the part 74 is received in the recess 82 in thecarriage body 64.

A plate 84 is secured to the forward face of the body 64 of the carriageassembly 60 by the bolts 86 and extends across one end of the recess 82.The plate 84 is provided with a bore 88 which is aligned with the bore81 in the member 74. A threaded member 90 extends through the bores 81and 88 and is held at its other end by the boss 92 on the carriage body64 and bolt 94. The member 74 and in turn the arm 69 may be positionedwithin the carriage body 64 by rotating the threaded member 90 so thatthe member 74 is moved either to the right or left by means of theco-operating threads on the threaded member 90 and the bore 81. Afterthe member 74 has been adjusted to its desired position, it may then belocked in place by the wedge members 98 which are slidably receivedbetween the shoulders 78 and the carriage body 64 as best shown inFigures and 6. The wedge members 98 are jammed into locking position bymeans of the bolts 100, whichextend through the wedge members and intothe carriage body 64.

It can now be seen that the invention as described pro- This arrangementhas been found to vides an automatic and accurate means for maintainingthe proper thickness of coating on rolls used in a continuousgalvanizing process. It is now apparent that the arm 69 may be adjustedwith respect to the supports 22 in order to accommodate various sizedrolls. The arm 69 and the cutting tool 70 are positioned so that as thecutting tool crosses the face of the roll, it leaves a thin coating ofthe galvanizing material on the roll. Thus, any excess of material builtup on the roll will be removed by the cutting tool 70 so as to provide athin, even coat along the entire surface of the roll.

Another advantage of the subject invention is the simplicity inconstruction and adaptability to be used with Zarious size and typecommercial galvanizing roll assemlies.

Although a preferred embodiment of the invention has been used in thedescription of the invention, it is contemplated that this is merely byway of example and is not to be construed in any manner as a limitation.It is apparent that certain modifications may be made within the scopeof the claims without departing from the spirit of the invention.

We claim:

1. A coating roll cleaning device in combination with a coating rollmounted on shaft means journaled between two frame members comprising avertically standing support member journaled at each end of said coatingroll on said shaft means, a translating means adapted to be rotatablydriven extending between said support members and rotatably journaledtherein, track means extending substantially the full length betweensaid support members, a carriage assembly adapted to ride on said trackmeans and operatively associated with said translating means, an armdepending from said carriage in the direction of said roll, and acutting implement having a width that is a fraction of the length ofsaid roll, mounted on said arm in closely associated relationship withthe periphery of said coating roll.

2. A coating roll cleaning device adapted to be used with a coating rollmounted on shaft means journaled between two frame members comprising, avertically standing support member journaled at each end of said coatingroll along said shaft means, a translating member adapted to berotatably driven extending between said support members and rotatablyjournaled therein, track members substantially parallel with saidtranslating member extending substantially the full length between saidsupport members, a carriage member riding on said track members andoperatively associated with said translating member so as to move in adirection substantially parallel with said translating means, an armdepending downwardly from said carriage, and an inwardly extendingcutting implement having a width that is a fraction of the length ofsaid roll, mounted on said arm in closely spaced relationship with theperiphery of said coating roll.

3. A coating roll cleaning device adapted to be used with a coating rollmounted on shaft means comprising a vertically standing support memberjournaled at each end of said coating roll on said shaft means, atranslating means adapted to berotatably driven extending between saidsupport members and rotatably journaled therein, track means extendingbetween said support members, a carriage assembly riding on said trackmeans and operatively associated with said translating means so as tomove in a direction substantially parallel with said translating means,an arm depending downwardly from said carriage assembly, a cuttingimplement mounted on said arm in closely spaced relationship with theperiphery of said coating roll, and means for rotating said translatingmeans so that said carriage assembly and said arm are reciprocated alongsubstantially the full length of the longitudinal axis of the coatingroll.

4. A coating roll cleaning device adapted to be used with a coating rollmounted on shaft means comprising a vertically standing support memberjournaled at each end of said coating roll on said shaft means, atranslating means adapted to be rotatably driven extending between saidsupport members and rotatably journaled therein, track means extendingbetween said support members, a carriage assembly riding on said trackmeans and operatively associated with said translating means so as tomove in a direction substantially parallel with said translating means,an arm extending downwardly from said carriage assembly, a cuttingimplement mounted on said arm in closely spaced relationship with theperiphery of the coating roll, means for rotating said translating meansso as to reciprocate said carriage assembly and said arm alongsubstantially the full length of'the longitudinal axis of the coatingroll, and means for 'adjusting said arm relative to said carriageassembly so as to adapt said roll cleaning device to various size rolls.

5. A roll cleaning device adapted to be used with a coating rollcomprising a vertically standing support member journaled at each end ofsaid coating roll on said shaft means, a translating means adapted to berotatably driven extending between said support members and 'rotatablyjournaled therein, track means extending between said support members, acarriage assembly riding on said track means and operatively associatedwith said translating means so as to move in a direction substantiallyparallel with said translating means, an arm depending downwardly fromsaid carriage assembly, a cutting implement mounted on the lower end ofsaid arm in closely spaced relationship with the periphery of saidcoating roll, means for rotating said translating means so as toreciprocate said carriage assembly and said arm along substantially thefull length of the longitudinal axis of the roll, and means foradjusting the position of said arm relative to said vertically standingsupport members so as to place said cutting implement in closely spacedrelationship with the periphery of the coating roll.

6. A coating roll cleaning device adapted to be used with a coating rollcomprising, a support member at each end of the coating rollsubstantially fixed with respect to the longitudinal axis of the coatingroll, a threaded translating means adapted to be rotatably drivenextending between said support members and rotatably journaled therein,track means extending substantially the full length between said supportmembers, a carriage assembly adapted to ride on said track means andoperatively associated with said threaded translating means so as tomove in a direction substantially parallel with said translating means,an arm depending from said carriage assembly in the direction of theroll, and a cutting implement having a width that is a fraction of thelength of said roll, mounted on said arm and normal-1y positioned inclosely spaced relationship with the periphery of the coating roll. 7. Acoating roll cleaning device adapted to be used with a coating rollcomprising, a translating means extending along substantially the fulllength of the longitudinal axis of the coating roll and verticallysupported therefrom, a carriage assembly adapted to ride on saidtranslating means in a direction substantially parallel therewith, anarm depending from said carriage assembly in the direction of the roll,and a cutting implement hav ing a width that is a fraction of the lengthof said roll, mounted on said arm and normally positioned in closelyspaced relationship with the periphery of the coating roll.

References Cited in the file of this patent UNITED STATES PATENTS129,238 Krom July 16, 1872 759,644 Sturtevant May 10, 1904 2,058,369Taylor Oct. 20, 1936 2,294,520 Staude Sept. 1, 1942 2,318,504 LoddingMay 4, 1943 2,357,963 Mclntire Sept. 12, 1944 FOREIGN PATENTS 1,112Great Britain 1869

